MARINA BEATRIZ AGOSTINI VASCONCELLOS

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Determination of inorganic components in brazilian medicinal plants by neutron activation analysis
1990 - SAIKI, M.; VASCONCELLOS, M.B.A.; SERTIE, J.A.A.
Instrumental neutron activation analysis (INAA) has been applied to multielemental determinations of medicinal extracts obtained from the plants. Cordia Verbenacea DC, Folidago Microglossa DC, and Petivefia Alliacea. Concentrations of the elements A1, Br, Ca, C1, Co, Cs, Fe, K, La, Mg, Mn, Na, Rb, Sb, and Zn have been determined in dried extracts of these herbs by short and long irradiations under a thermal neutron flux of 10n-1013n/cm2s in the IEA-R1 nuclear reactor. The NBS Tea Leaves (1572) and NIES Pepperbush (1) reference materials were analyzed simultaneously with the plant extracts. The results obtained in these analyses have shown a good accuracy and reproducibility of the method. The relative errors and the relative standard deviations were less than 10% for most of the elements analyzed.
Toxic heavy metals and other trace elements in foodstuffs from 12 different Countries
1994 - CORTES TORO, E.; DAS, H.A.; FARDY, J.J.; BIN HAMZAH, Z.; IYER, R.K.; LAIYAN, S.; LEELHAPHUNT, N.; MURAMATSU, Y.; PARR, R.M.; QURESHI, I.H.; RESNIZKY, S.M.; SURTIPANTI, S.; TARAFDAR, S.A.; VASCONCELLOS, M.B.A.
Neutron activation analysis of biological samples at the Radiochemistry Division of IPEN-CNEN/SP
1994 - SAIKI, M.; VASCONCELLOS, M.B.A.; MAIHARA, V.A.; ARMELIN, M.J.A.; FAVARO, D.I.T.; ROGERO, S.O.